// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//  
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
using SharpCifs.Util;
using SharpCifs.Util.Sharpen;

namespace SharpCifs.Smb
{
    internal class Trans2QueryPathInformationResponse : SmbComTransactionResponse
    {
        internal const int SMB_QUERY_FILE_BASIC_INFO = unchecked(0x101);

        internal const int SMB_QUERY_FILE_STANDARD_INFO = unchecked(0x102);

        internal class SmbQueryFileBasicInfo : IInfo
        {
            internal long CreateTime;

            internal long LastAccessTime;

            internal long LastWriteTime;

            internal long ChangeTime;

            internal int Attributes;

            // information levels
            public virtual int GetAttributes()
            {
                return Attributes;
            }

            public virtual long GetCreateTime()
            {
                return CreateTime;
            }

            public virtual long GetLastWriteTime()
            {
                return LastWriteTime;
            }

            public virtual long GetSize()
            {
                return 0L;
            }

            public override string ToString()
            {
                return "SmbQueryFileBasicInfo["
                            + "createTime=" + Extensions.CreateDate(CreateTime)
                            + ",lastAccessTime=" + Extensions.CreateDate(LastAccessTime)
                            + ",lastWriteTime=" + Extensions.CreateDate(LastWriteTime)
                            + ",changeTime=" + Extensions.CreateDate(ChangeTime)
                            + ",attributes=0x" + Hexdump.ToHexString(Attributes, 4) + "]";
            }

            internal SmbQueryFileBasicInfo(Trans2QueryPathInformationResponse enclosing)
            {
                this._enclosing = enclosing;
            }

            private readonly Trans2QueryPathInformationResponse _enclosing;
        }

        internal class SmbQueryFileStandardInfo : IInfo
        {
            internal long AllocationSize;

            internal long EndOfFile;

            internal int NumberOfLinks;

            internal bool DeletePending;

            internal bool Directory;

            public virtual int GetAttributes()
            {
                return 0;
            }

            public virtual long GetCreateTime()
            {
                return 0L;
            }

            public virtual long GetLastWriteTime()
            {
                return 0L;
            }

            public virtual long GetSize()
            {
                return EndOfFile;
            }

            public override string ToString()
            {
                return "SmbQueryInfoStandard["
                            + "allocationSize=" + AllocationSize
                            + ",endOfFile=" + EndOfFile
                            + ",numberOfLinks=" + NumberOfLinks
                            + ",deletePending=" + DeletePending
                            + ",directory=" + Directory + "]";
            }

            internal SmbQueryFileStandardInfo(Trans2QueryPathInformationResponse enclosing)
            {
                this._enclosing = enclosing;
            }

            private readonly Trans2QueryPathInformationResponse _enclosing;
        }

        private int _informationLevel;

        internal IInfo Info;

        internal Trans2QueryPathInformationResponse(int informationLevel)
        {
            this._informationLevel = informationLevel;
            SubCommand = Smb.SmbComTransaction.Trans2QueryPathInformation;
        }

        internal override int WriteSetupWireFormat(byte[] dst, int dstIndex)
        {
            return 0;
        }

        internal override int WriteParametersWireFormat(byte[] dst, int dstIndex)
        {
            return 0;
        }

        internal override int WriteDataWireFormat(byte[] dst, int dstIndex)
        {
            return 0;
        }

        internal override int ReadSetupWireFormat(byte[] buffer, int bufferIndex, int len)
        {
            return 0;
        }

        internal override int ReadParametersWireFormat(byte[] buffer,
                                                       int bufferIndex,
                                                       int len)
        {
            // observed two zero bytes here with at least win98
            return 2;
        }

        internal override int ReadDataWireFormat(byte[] buffer, int bufferIndex, int len)
        {
            switch (_informationLevel)
            {
                case SMB_QUERY_FILE_BASIC_INFO:
                    {
                        return ReadSmbQueryFileBasicInfoWireFormat(buffer, bufferIndex);
                    }

                case SMB_QUERY_FILE_STANDARD_INFO:
                    {
                        return ReadSmbQueryFileStandardInfoWireFormat(buffer, bufferIndex);
                    }

                default:
                    {
                        return 0;
                    }
            }
        }

        internal virtual int ReadSmbQueryFileStandardInfoWireFormat(byte[] buffer,
                                                                    int bufferIndex)
        {
            int start = bufferIndex;
            SmbQueryFileStandardInfo info = new SmbQueryFileStandardInfo(this);
            info.AllocationSize = ReadInt8(buffer, bufferIndex);
            bufferIndex += 8;
            info.EndOfFile = ReadInt8(buffer, bufferIndex);
            bufferIndex += 8;
            info.NumberOfLinks = ReadInt4(buffer, bufferIndex);
            bufferIndex += 4;
            info.DeletePending = (buffer[bufferIndex++] & unchecked(0xFF)) > 0;
            info.Directory = (buffer[bufferIndex++] & unchecked(0xFF)) > 0;
            this.Info = info;
            return bufferIndex - start;
        }

        internal virtual int ReadSmbQueryFileBasicInfoWireFormat(byte[] buffer,
                                                                 int bufferIndex)
        {
            int start = bufferIndex;
            SmbQueryFileBasicInfo info = new SmbQueryFileBasicInfo(this);
            info.CreateTime = ReadTime(buffer, bufferIndex);
            bufferIndex += 8;
            info.LastAccessTime = ReadTime(buffer, bufferIndex);
            bufferIndex += 8;
            info.LastWriteTime = ReadTime(buffer, bufferIndex);
            bufferIndex += 8;
            info.ChangeTime = ReadTime(buffer, bufferIndex);
            bufferIndex += 8;
            info.Attributes = ReadInt2(buffer, bufferIndex);
            bufferIndex += 2;
            this.Info = info;
            return bufferIndex - start;
        }

        public override string ToString()
        {
            return "Trans2QueryPathInformationResponse[" + base.ToString() + "]";
        }
    }
}
